Summary
International Symposium on Antennas and Propagation
2010
Session Number:3TE1
Session:
Number:3TE1-3
Analysis of Electromagnetic Backscattering by Rotating Flat Blades
Ik-Hwan Choi, Ho Lim, Dong-Wook Seo, Ky-Ung Bae, Noh-Hoon Myung,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
As the small flights which are usually used for aerial reconnaissance have small radar cross section (RCS) like a bird, discriminative feature extraction is necessary for target recognition. A propeller in front or on top of body makes distinct electromagnetic feature, and numerous studies have been carried out to analyze wave scattering from this structure. In 1979, Lahaie [1] attempted to solve the problems by using quasi-stationary approach and physical optics (PO) approximation. They apply the quasi-stationary approach, proposed by Van Bladel firstly. In 1992, Bor and Yang [2] tried to employ physical theory of diffraction (PTD)-equivalent currents method (ECM) to estimate RCS of three rotating metal blades, assuming infinitely perfect electric conducting (PEC) rectangular plates. In 1994, Sun [3] proposed geometrical theory of diffraction (GTD) and ECM. In 2002, Pouliguen [4] used PO/PTD and ECM to calculate scattered fields considering locations of a radar transmitter and a receiver in relation to the center of symmetry of the rotor. In this paper, GTD and ECM are used to analyze backscattering far fields from four rotating PEC and dielectric covered PEC rectangular plates considering phase differences among the plates.